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<h1>Potassium titanyl phosphate, KTiOPO<sub>4</sub> (KTP)</h1>

Potassium titanyl phosphate (KTiOPO<sub>4</sub>, commonly abbreviated as KTP) is a nonlinear optical material widely used in a variety of photonic applications, including frequency doubling of laser sources, optical parametric oscillation, and electro-optic modulation. KTP exhibits a broad transparency range from approximately 350 nm to 4.5 μm. One of its noteworthy advantages is its high damage threshold, which makes it suitable for high-power laser applications. The crystal also exhibits good phase-matching conditions over an extensive range of wavelengths, making it a material of choice for tunable and multi-wavelength laser sources. It's commonly utilized in green laser pointers via frequency doubling of Nd:YAG or Nd:YVO<sub>4</sub> lasers, which emit at 1064 nm. Overall, KTP's combination of optical and mechanical properties make it an important material in the field of nonlinear optics.

<h2>External links</h2>
<ul>
<li><a href="https://en.wikipedia.org/wiki/Potassium_titanyl_phosphate">Potassium titanyl phosphate - Wikipedia</a></li>
<li><a href="http://www.optical-components.com/KTP-crystal.html">KTP Crystal, Potassium Titanium Oxide Phosphate - Optical Components</a></li>
</ul>
